ResponsePorts and sending notifications to subscribers RRS feed

  • Question

  • Using this code snippet from the DSS docs:


     InsertItem(InsertItem insert)
     SendNotification(_subMgrPort, insert);


    I am trying to understand the ResponsePort's usage. I assume the ResponsePort is the "service forwarder" (i.e the representation of the main port of the calling service).  However, is the function of this code:


    Just to ensure the service who invoked the Insert knows that the Insert handler has been executed ?  Since we are sending a notification with the insert object, would there really be a need for the post on the response port ?

    Thanks in advance.

    Thursday, July 8, 2010 5:09 PM


  • The response port is usually a PortSet with the response type and "Fault" class. When you send a request to a service, you may want to know if your request has been successful, so you just wait back for a response on the response port. With only the notification, you would have no way to check if your request has been executed correctly :

    - On error, usually a service doesn't send a notification

    - The notifications could be issued by another request sent by another service

    Additionaly, the reponse port pattern is very easy to use when you need to do some coordination



    • Marked as answer by Rybolt Friday, July 9, 2010 1:25 PM
    Friday, July 9, 2010 6:18 AM